In the lecture, Constants on the Path to Jihad, at marker 2:29, Awlaki states that Yusuf al-Uyayri was killed by the “security forces of the Arabian peninsula”. This is a made up name. There is no such group.
Yusuf al-Uyayri was killed by the Saudi Arabia police
This shows that Awlaki is trying to protect the reputation of Saudi Arabia, but a real Salafi Jihadist would not do this, because hatred for the ruling family of Saudi Arabia is well known among the Salafi Jihadists or Khawarij, who oppose the rule by the Kingdom of Saudi Arabia, whom they believe are not ruling with true sharia.